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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

In situ characterization of the effects of Nb and Sn on the anatase-rutile transition in TiO2 nanotubes using high-temperature X-ray diffraction

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Verissimo, Nathalia C. [1] ; Cremasco, Alessandra [1, 2] ; Rodrigues, Christiane A. [3] ; Bertazzoli, Rodnei [1] ; Caram, Rubens [1]
Total Authors: 5
[1] Univ Estadual Campinas, Sch Mech Engn, Campinas, SP - Brazil
[2] Univ Estadual Campinas, Sch Appl Sci, Limeira, SP - Brazil
[3] Univ Fed Sao Paulo, Dept Exact & Earth Sci, Sao Paulo - Brazil
Total Affiliations: 3
Document type: Journal article
Source: Applied Surface Science; v. 307, p. 372-381, JUL 15 2014.
Web of Science Citations: 9

New metastable p-type Ti alloys for biomedical applications containing biocompatible alloying elements such as Nb can present remarkable mechanical behavior. Whenever the performance of an implant produced from p-type Ti alloys is considered, it is crucial to take into account their surface properties because they are intimately associated with osseo-integration. The osseo-integration of orthopedic implant devices made from CP-Ti to p-type Ti alloys depends directly on the properties of the oxide layer formed on their surface. The aim of this study was to investigate the formation of self-organized TiO2 nanotubes by an anodization process on CP-Ti and Ti-35Nb and Ti-35Nb-4Sn alloys (wt.%) and analyze the effects of Nb and Sn additions to CP-Ti on the amorphous-anatase and anatase-rutile phase transformations in TiO2 nanotubes using glazing-angle high-temperature X-ray diffraction. The results obtained suggest that the crystallization of Ti 02 formed on CP-Ti occurs at 225 C, whereas the anatase-rutile transition occurs at 400 C. As Nb was added to Ti, the temperatures at which these phase transformations occur increased. When Sn was added to Ti-35Nb alloy, the kinetics of the phase transformations appeared to decrease. 2014 Elsevier B.V. All rights reserved. (AU)

FAPESP's process: 11/23942-6 - Precipitation of alfa and omega phases and recrystallization phenomena in plastically cold deformed Ti-Nb-Sn alloys
Grantee:Rubens Caram Junior
Support Opportunities: Regular Research Grants